Starting means for explosive-engines.



No. 892,199. PATENTED JUNE 30, 1908.

' W. R. WEBSTER.

STARTING MEANS FOR EX'PLOSIVE ENGINES. APPLIOATION FILED NOV. 3. 190a.RENEWED D30. 14. 1907.

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W M B! M a! 4. Q

I TTURNEY.

PATENTED JUNE 30, 1908.

W. R. WEBSTER. STARTING MEANS FOR EXPLOSIVE ENGINES. APPLICATION IILB'DNOV. 3. 1909. RENEWED DBO. 14. 1997.

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WITNESSES A TTORNEY.

' UNITED srntrns P rENT OFFICE.

.WILLIAM R. WEBSTER, 'OF PHILADELPHIA,PENNSYLVANIA;

STARTING MEANS FOR EXPLQSIVEE-NG-INES.

Specification of Letters Ratent;

Patented June 30, 1908.

Application filed-November 3, 1906, Serial No 341,872. Renewed December14, 1907. Serial No. 406,487.:

--T-dll whcht it may concern:

' Be it known that 1, WILLIAM R, WEBSTER, a citizen of the UnitedStates, anda resident of the city .and county-of Philadelphia,- State ofPennsylvania, haveinvented certain new and useful Improvements inStarting Means for Explosiveden reversal of the starting crank.

filed October 24, 1906, I have shown and de--' -In a ending applicationfor LettersPatent of t 'e United States, Serial No. 340,261,

scribed a safety starting device for explosive engines in which-theshaft of the starting crankcarries a gear wheel the teeth of whichformparts of screw threads which engage a 'detent. -Upon a forwardmovement of the starting cranki'n thisdevice the screw thread like teethof the gear wheel pass over anddethe latter.

- causes the gearwheel and the crank shaft the en press the detent andthe clutches on the crank and engine shafts engage, the former drivingA-reverse movement of theen'- gine shaft causes'a reverse movement ofthe crank shaft until one of the teeth of the gear carried byithislatter. shaft, engages the detent-which acting upon .the screW liketooth carryin'git to'be moved laterally awayfrom these s afts areunlocked when movement of the crank ceases.

' I accomplish the above results in my pres -.en t inve' nt1onbut-instead of the gear wheel having inclined teeth and bein -fasttothecrank shaft; I employ ratchet w :el loose on the crank shaft and I.permit the crank-shaft to move laterally of the ratchet 'wheel whichhas nolateral movement; Throughsuitable mechanism 1' drive the ratchetwheel in-one directionb the movement of the crank 'shaft and -t ough'the gear wheel and suit- 'able connections 'I'C3,11S6 the crank shaft,

upon areverseimovement of the engine shaft,'. to move laterally untilthe clutches locking these shafts togetherare disengaged.

In the accompanying drawingsforming part] of this specification V and inwhich similar letters of reference indicate similar I parts; Figure 1,is a side elevation, partly'in ne shaft until the clutches carried bysection, of my improved explosive engine starting means,- the clutchesupon the engine ment; Fig. '6, a similar view, the clutches beingdlsengaged; Fig. 7, a section of FI 6 on line 77 Fig. 8, a top view ofthe forked end of hub of ratchet wheel, Figs. 5' and 6.

a is part of the shaft of an explosive engine, b the clutch carried by.this shaft, 0 the starting crankshaft, d the clutch carried by thisshaft, e part of the starting crank, f the bearing carrying the startingcrank and shaft. All of these parts are usual and well knownf Referringnow to Figsyl, 2, 3, 4, g is a ratchet wheel surrounding the shaft 0 andprevented from lateral movement by the sides of the bearing a h is apawl, or detent permitting the rotation'of the ratchet wheel 1n onedirection but not in theother. 'i is a pin-passing through shaft 0, orteeth ,or lugs carried by opposite sides of the shaft, the ends of whichare adapted to engage inclined faces formed in'side of the ratchet'wheelg. pona movement of the startin crank and shaft toturn over the enginesha t a, the pin, teeth, or lugs 71, engage the faces 1', and 'move inalong these faces until the clutches bd are in engagement and a furthermovement of the starting crank turns over the engine and causes theratchet wheel 9 to rotate. 1

If now a back kick should occur the movement of the shafts would bereversed and the pins 1'. would act to reverse the motion of ratchetwheel 9,.but this movement of the ratchet is prevented by the pawl h,the con sequence is that the pins '11 will have to travel along .thesides-of the inclined faces 7c, as in dicated by dotted'lines in Fig. 4;they will thus cause shaft 0 to move rotarily and later ally until thelatter movement is so great as to unl' ck the clutches b-d. I

In igs. 56 'Z and 8, a modification of this device is-shown,a hub Z,fast to ratchet wheel 9, carries a forked end, the sides of the forksbeing inclined as are the faces j-k.already described, and the crankhandle e takin the place of the pin 6. The operation of this deviceisprecisely similar to that already described and further description willbe unnecessary It W'll be observed that upon a reverse movement of thestarting crank handle and shaft the pin 1', or the part that takes theplace ofthis pin, is in engagement with the inclined face is formed inthe ratchet wheel or on a hub carried by this wheel. This arrangementprevents a quick and free reverse movement of the crank while serving tomove the crank shaft clutch out of engagement with the engine shaftclutch.

Having thus described my invention I claim as new and desire to secureby Letters Patent:

1. In a starting mechanism of. the class described, in combination, anengine shaft, a

starting crank shaft and crank, a clutch one' member of which is carriedby the engine shaft and the other by the crank shaft, a ratchet wheelsurrounding but not attached to said crank shaft, a pawl adapted topre-'.

vent the rotation of ratchetwheel in one direction, and a connectionbetween said crank shaft and ratchet wheel by means of which a rotationof said crank shaft in one direct-ion will cause a rotation of saidratchet wheel and advance the clutch on said crank shaft into engagementwith the clutch on said engine shaft, and a rotation of said engineshaft in the opposite direction will cause a longitudinal movement ofsaid crank shaft through said ratchet wheel and away lrom saideng'ineshaft.

In a starting mechanism of the class descr bed, in combination, anengine shalt, a

I startingcrank shaft, a clutch one member of which is carried. by theengine shaft and the other by the crank shaft, a pin or projectioncarried 'by said starting crank shaft, a ratchet wheel loose on'saidcrank shaft, and furnished with inclined faces adapted to be engagedby'said pin or projection, and a and a pawl for preventing a backwardmovement of said ratchet wheel.

WM. R. WEBSTER.

v v itnesses GEORGE W. SELTZER, CHARLEs A. BUTTER.

